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Analog Devices Inc. LT6237CMS8#PBF
- Part No.:
- LT6237CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT6237CMS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,930
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Product details
Overview
LT6237CMS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise operational amplifier optimized as a SAR ADC driver. It delivers 1.1nV/√Hz input voltage noise density, 215MHz gain-bandwidth product, 70V/µs slew rate, and 3.5mA supply current per amplifier, operating from 3V to 12.6V supplies. Its 570ns settling time to 18-bit accuracy and ±50mV output swing within rails make it ideal for high-resolution data acquisition in precision instrumentation.
For engineers reviewing the LT6237CMS8#PBF datasheet, LT6237CMS8#PBF pinout, LT6237CMS8#PBF application, or LT6237CMS8#PBF equivalent, key selection criteria include verified 18-bit SAR ADC driving capability, guaranteed 0°C to 70°C operation in MSOP-8 package, low 350µV max input offset voltage, and confirmed rail-to-rail output swing with <117dB SFDR at 2kHz.
Technical Context
The LT6237CMS8#PBF implements a complementary bipolar input stage enabling ultra-low voltage noise and fast settling. Its architecture supports unity-gain stable operation with capacitive loads up to 100pF while maintaining phase margin >40° across supply voltages from 3V to ±5V.
It features matched dual amplifiers with channel-to-channel offset voltage match ≤600µV and input bias current match ≤0.9µA, enabling precise differential signal conditioning. The device lacks shutdown functionality-unlike the LT6236-making it strictly a dual-channel continuous-operation op amp.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 1.1nV/√Hz at 10kHz - enables sub-100µV RMS noise in 1MHz bandwidth for 18-bit ADC front-ends |
| Gain-Bandwidth | 215MHz - supports stable gain ≥10 up to 20MHz, critical for wideband sensor signal conditioning |
| Slew Rate | 70V/µs - ensures full-scale 4V step settles within 570ns to 18-bit (4ppm) accuracy |
| Input Offset | 350µV max - maintains ≤0.0085% gain error in 4V full-scale systems without trimming |
| Supply Range | 3V to 12.6V single or ±1.5V to ±5V dual - compatible with 3.3V, 5V, and industrial ±5V rails |
| Output Swing | Within 50mV of rails at 20mA load - maximizes dynamic range in low-voltage 16/18-bit SAR ADC interfaces |
| THD @ 2kHz | –116.8dB - preserves signal fidelity for audio and precision measurement applications |
Pinout & Package
LT6237CMS8#PBF is housed in an 8-lead plastic MSOP package (MS8), 3mm × 3mm footprint, 0.85mm max height, with exposed pad optional for thermal enhancement. Pin 1 marked via dot; pin numbering follows standard MSOP convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives high-impedance loads or ADC input directly; rail-to-rail swing supports full-scale utilization |
| 2 (–IN A) | Inverting input A | Differential pair input node; 2.9pF common-mode capacitance affects high-frequency stability |
| 3 (+IN A) | Non-inverting input A | High-impedance node (6.5MΩ); matched to –IN A for precision differential gain stages |
| 4 (V–) | Negative supply rail | Reference for internal biasing; undersurface metal connection improves PSRR and thermal performance |
| 5 (V+) | Positive supply rail | Accepts 3V–12.6V single or positive rail of dual supply; decoupling required within 5mm |
| 6 (OUT B) | Amplifier B output | Independent output; channel separation >110dB at 1MHz enables simultaneous dual-channel sampling |
| 7 (–IN B) | Inverting input B | Matched to –IN A (≤600µV offset difference); supports tightly coupled differential ADC drivers |
| 8 (+IN B) | Non-inverting input B | Electrically identical to +IN A; enables true dual-channel signal conditioning without cross-talk |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range into 10kΩ loads with ≤50mV headroom, maximizing SNR in 3.3V/5V ADC systems |
| 1.1nV/√Hz input noise | Enables 99.7dB SNR in 1MHz bandwidth-critical for 18-bit SAR ADCs like LTC2389-18 |
| 570ns 18-bit settling | Guarantees accurate sampling at ≥1.75Msps without dead-time insertion in pipelined data acquisition |
| 215MHz GBW with 70V/µs SR | Supports closed-loop gains ≥10 at 10MHz while preserving fast transient response for pulse-shaped signals |
| 0°C to 70°C specified operation | Validated performance across commercial temperature range-no derating needed for office/lab equipment |
Applications
| High-Speed Data Acquisition | Precision Instrumentation |
|---|---|
Use Scenario: Driving 18-bit, 2.5Msps SAR ADC (e.g., LTC2389-18) in automated test equipment with 2kHz sine-wave input at –1dBFS. IC Role / Device Role / Timing Role: Dual-channel differential driver providing matched gain, phase, and noise performance to both ADC inputs. Use Value: Achieves 98.9dB SINAD and 117.7dB SFDR-enabling accurate harmonic analysis without external filtering. | Use Scenario: Front-end amplification in portable digital multimeters measuring µV-level thermocouple outputs. IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage with rail-to-rail output interfacing to 24-bit ΣΔ ADC. Use Value: 350µV max offset and 0.5µV/°C drift minimize calibration frequency; 1.1nV/√Hz noise preserves resolution below 1µV. |
| Medical Sensor Signal Chain | Active Filter Design |
Use Scenario: Amplifying low-amplitude ECG signals (±2mV) in battery-powered patient monitors with 3.3V supply. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with high CMRR and low power consumption. Use Value: 115dB CMRR rejects 50/60Hz interference; 3.5mA total supply current extends battery life beyond 72 hours. | Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter preceding high-speed ADC in communications receivers. IC Role / Device Role / Timing Role: Dual op amp configured as cascaded 2nd-order sections with precise pole placement. Use Value: 215MHz GBW ensures filter group delay flatness to 10MHz; matched channels maintain amplitude/phase symmetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4898-2ARMZ | Higher 1.05nV/√Hz noise, 210MHz GBW, but 12.6mA supply current per amp - 3.6× higher power | Targeted at ultra-low distortion (<–120dB THD) rather than low-power ADC driving | Select when THD <–120dB at 10kHz is mandatory and power budget allows ≥12mA per channel |
| OPA211IDR | Lower 1.1nV/√Hz noise, 45MHz GBW, 3.6mA supply current - 4.8× lower bandwidth limits 16-bit+ settling | Optimized for DC-precision and low drift (0.1µV/°C), not high-speed settling | Select when offset drift <0.2µV/°C dominates over speed, e.g., strain gauge bridges with slow-scan ADCs |
Compared with ADA4898-2ARMZ and OPA211IDR, the LT6237CMS8#PBF uniquely balances 215MHz bandwidth, 1.1nV/√Hz noise, and 3.5mA supply current-making it the only dual op amp qualified for 18-bit SAR ADC driving at ≤5V supply with sub-600ns settling.
Availability
LT6237CMS8#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, medical sensor signal chains, and active filter design requiring stable component supply across commercial temperature grades.
Supply support for LT6237CMS8#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its high-performance analog portfolio. Linear Technology was renowned for precision op amps, voltage references, and power management ICs targeting demanding industrial and instrumentation markets.
The LT6237CMS8#PBF belongs to the LT6236/LT6237/LT6238 family-designed specifically for driving high-resolution SAR ADCs with minimal noise, distortion, and settling time penalties in space-constrained, low-voltage systems.
FAQ
What is the maximum supply voltage for LT6237CMS8#PBF?
The LT6237CMS8#PBF supports a total supply voltage of up to 12.6V, whether operated from a single 12.6V rail or dual ±6.3V supplies. Absolute maximum rating is 12.6V between V+ and V– pins; exceeding this risks permanent damage. Operation at 12.6V is fully characterized for noise, bandwidth, and output swing per the datasheet's electrical characteristics table.
Does LT6237CMS8#PBF have a shutdown pin?
No, the LT6237CMS8#PBF does not include a shutdown feature. Shutdown functionality is exclusive to the LT6236 (single-channel variant); the LT6237 and LT6238 dual/quad versions lack ENABLE pins. All channels operate continuously when powered, drawing 3.5mA per amplifier under typical conditions.
What is the guaranteed operating temperature range for LT6237CMS8#PBF?
The LT6237CMS8#PBF is specified for 0°C to 70°C operation (C-grade). This is explicitly indicated by the "C" suffix in the part number and confirmed in the Order Information table, where LT6237CMS8#PBF is listed under "0°C to 70°C" temperature range. Performance parameters such as offset voltage, noise, and bandwidth are guaranteed across this range.
Can LT6237CMS8#PBF drive a 100Ω load while maintaining rail-to-rail output swing?
Yes, the LT6237CMS8#PBF can drive a 100Ω load with rail-to-rail swing, though output voltage compliance degrades: at VS = 5V, VOH is 4.6V min (400mV from rail) and VOL is 0.4V max (400mV from rail) under 15mA source/sink. For full 50mV rail margin, limit load current to ≤5mA-achievable with 1kΩ+ loads or buffered 100Ω interfaces.
Is LT6237CMS8#PBF pin-compatible with other packages in the LT6237 family?
No, LT6237CMS8#PBF (MSOP-8) is not pin-compatible with LT6237IDD#PBF (3mm × 3mm DFN-8). Although both are 8-lead dual op amps, the DFN package assigns V– to pin 4 and V+ to pin 5, while MSOP places V– at pin 4 and V+ at pin 5-same pin order-but the DFN's pin 1 is OUT A and pin 6 is OUT B, matching MSOP. However, DFN has exposed thermal pad (not electrically connected), whereas MSOP has no thermal pad. PCB layout must be redesigned for package swap.
LT6237CMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 70V/µs
- Gain Bandwidth Product:
- 215 MHz
- -3db Bandwidth:
- 90 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 3.3mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT6237CMS8#PBF FAQ
1.How can I place an order for LT6237CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6237CMS8#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT6237CMS8#PBF reliable?
The price and inventory of LT6237CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6237CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT6237CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6237CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6237CMS8#PBF?
LT6237CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6237CMS8#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT6237CMS8#PBF?
For technical support, including LT6237CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6237CMS8#PBF requirements.
6.How does Aetrix verify that LT6237CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT6237CMS8#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT6237CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LT6237CMS8#PBF?
All LT6237CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6237CMS8#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT6237CMS8#PBF part is unused and in its original packaging.
Return procedure for LT6237CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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